WGU C107

The cardiovascular system is composed of: - -Heart, blood vessels, and blood The blood vessels that carry blood away from the heart are called: - -Arteries The heart would best be described as being composed of: - -Two atria and two ventricles Which of the following structures is mainly composed of connective tissue? - -Blood - Blood is considered a connective tissue, with the watery plasma being the matrix. The automaticity of the heart refers to its ability to: - -Generate its own heart r...

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2 pages

Written in 2023/2024

Grade A+

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Which of the following statements is NOT true about endocrine glands? - -They contain ducts. - This is not a true statement, as these glands generally release their hormones directly into the bloodstream from the cells that make the hormone(s). The pineal gland is located in the: - -Brain - It is located between the two cerebral hemispheres. The hypophyseal portal system is used to control the: - -Anterior pituitary - Tropic hormones from the hypothalamus travel through this portal system t...

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4 pages

Written in 2023/2024

Grade A+

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Which part of the ear contains the ossicles? - -Middle ear - Ossicles are the bones that transmit sound waves in the middle ear. Which part of the ear contains the auricle? - -Outer ear - The auricle is the cartilage shell of the ear, which is part of the outer ear. Which part of the ear contains the cochlea? - -Inner ear - The cochlea is the wrapped tube that transmits electrical signals found in the inner ear. What are the receptor cells in the ear that transmit force to electrical signa...

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3 pages

Written in 2023/2024

Grade A+

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Which of the following components of the eye is responsible for focusing light on the back of the eye? - -Ciliary body The anterior fibrous tunic of the sclera is highly modified to form a transparent area of the eye known as the: - -Cornea What is the order of the eyeball covering from outside to inside? - -Fibrous tunic, vascular tunic, nervous tunic What is the majority of the eyeball volume? - -Vitreous body Where is the retina located in the eye? - -The posterior aspect of the eye

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3 pages

Written in 2023/2024

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Which of the following are associated with the sensations of sight, hearing, and smell? - -Specialized receptor cells Which of the following is NOT matched with their stimuli? - -All of these are correctly matched. Exteroceptors - External environment Interoceptors - Internal organs Proprioceptors - Muscles, tendons, joints What is the function of a mechanoreceptor? - -They sense physicial stimuli, including pressure, vibration, sound and gravity.

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2 pages

Written in 2023/2024

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What causes contralateral motor control? - -Decussation - Nerves crossing over, also called decussation, causes the contralateral or opposite sidedness of motor control. Which best defines cranial nerves? - -Peripheral nerves that emerge from the brain. - These nerves come directly from the brain and regulate functions in the head. Match the following cranial nerve with its role. Oculomotor nerve: - -Movement of the eyes and dilation of pupils - Oculo refers to the eye and motor refers to ...

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4 pages

Written in 2023/2024

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What are gyri and sulci? - -Depressions and ridges of the brain folds. - Depressions are sulci, and gyri are ridges. What separates the hemispheres of the cerebrum? - -The longitudinal fissure Which is NOT a major structure of the brain? - -Frontbrain - There is a region of the brain called the forebrain, and there is a frontal cortex of the cerebrum, but there is no frontbrain. Location 1: - -The cerebrum - The large superior structure is the cerebrum. Location 2: - -The forebrain - The f...

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5 pages

Written in 2023/2024

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In the neuron above, which appropriately labels the axon(s)? - -B - is pointing to the singular axon structure. In the neuron above, which appropriately labels the dendrite(s)? - -A - is the branched dendritic structure. Neurons can have thousands or tens of thousands of dendrites. In the neuron above, which appropriately labels the soma? - -Neither A nor B - The soma is the cell body, which includes the nucleus (schematized as the pink dot) and other organelles. What role does the soma pl...

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4 pages

Written in 2023/2024

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How do the cells of the nervous system transmit signals? - Both electrical or chemical signals - Electrical signals are transmitted through the neuron and chemical signals are transmitted between neurons. What molecule moves across a synapse? - Neurotransmitters - Neurotransmitters including dopamine, epinephrine, etc., are the chemicals that travel through synapses. What type of signals move from the central nervous system to the peripheral nervous system? - Efferent signals What is anot...

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2 pages

Written in 2023/2024

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To stimulate skeletal muscle contraction, acetylcholine must cross the __________ of the neuromuscular junction and bind to receptors on the motor end plate. - -Synaptic cleft The folded sarcolemma of the muscle fiber that interacts with the neuron is called: - -The motor end plate Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction? - -Axon of neuron, sarcolemma, T tubules Release of Ca2+ from whi...

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4 pages

Written in 2023/2024

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To stimulate skeletal muscle contraction, acetylcholine must cross the __________ of the neuromuscular junction and bind to receptors on the motor end plate. - -Synaptic cleft The folded sarcolemma of the muscle fiber that interacts with the neuron is called: - -The motor end plate Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction? - -Axon of neuron, sarcolemma, T tubules Release of Ca2+ from whi...

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4 pages

Written in 2023/2024

Grade A+

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The outermost layer of connective tissue surrounding a skeletal muscle is the: - -Epimysium Which best describes the organization of a skeletal muscle organ? - -Hundreds of muscle fibers compartmentalized into numerous units by collagen connective tissue. Myosin is: - -A motor enzyme. The contractile organelles of a skeletal muscle fiber are thread-like structures called: - -Myofibrils Which of the following regions of a sarcomere contain(s) thin filaments? - -Both I-band and A-band.

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3 pages

Written in 2023/2024

Grade A+

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The outermost layer of connective tissue surrounding a skeletal muscle is the: - -Epimysium Which best describes the organization of a skeletal muscle organ? - -Hundreds of muscle fibers compartmentalized into numerous units by collagen connective tissue. Myosin is: - -A motor enzyme. The contractile organelles of a skeletal muscle fiber are thread-like structures called: - -Myofibrils Which of the following regions of a sarcomere contain(s) thin filaments? - -Both I-band and A-band. The t...

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3 pages

Written in 2023/2024

Grade A+

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Which of the following bones is properly matched with its function? - -Clavicle - Helps keep the shoulder in place. Protection of internal organs would most commonly be carried out by which components of the skeletal system? - -Bones and cartilage Hematopoiesis is: - -The formation of blood cells. Which of the following functions are NOT impacted by blood cell formation? - -Heart muscle repair - Heart muscles cannot be repaired. Synarthrosis joints involve what type of bones? - -Flat bone...

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3 pages

Written in 2023/2024

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Which classification of bone tissue has trabeculae? - -Spongy bone For the following, identify the macroscopic structures of compact bone. Compact bone: - -Osteons Where are osteocytes found within the osteons? - -Lacunae What is the transition between the diaphysis and epiphysis called? - -Metaphysis What type of bone is found in the diaphysis and epiphysis? - -Spongy in the epiphysis and compact in the diaphysis. Which is NOT part of mature bone? - -Proteoglycans - Proteoglycans are par...

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4 pages

Written in 2023/2024

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Which structure in the skeletal system is responsible for linking bones to other bones to stabilize the articulation? - -Ligaments Which structure in the skeletal system is responsible for lubrication and shock absorption? - - Cartilage Which structure in the skeletal system is responsible for connecting bones to muscles? - -Tendons What type of bone is the carpal? - -Short bone What type of bone is the femur? - -Long bone Which type of bone forms the skull? - -Flat bone

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2 pages

Written in 2023/2024

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The protein that makes the epidermis skin waterproof is: - -Keratin What is the main function of melanin? - -Protect cells in the stratum basale from ultraviolet light. The skin is responsible for forming: - -A precursor to the active form of vitamin D. Which of the following is NOT a non-barrier function of the skin? - -Abrasion resistance Which of the following is NOT a function of the hypodermis? - -Acts as a barrier to prevent microorganism entry. Which glands would be most active in t...

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3 pages

Written in 2023/2024

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The integument is composed of: - -Epidermis and dermis Which of the following is NOT a composed of connective tissue? - -Epidermis - The epidermis is epithelial tissue. The greatest number of different cell types would be found in the: - -Stratum basale The most superficial layer of the epidermis is: - -Stratum corneum Merkel cells are a type of: - -Sensory cell Which cell type provides function, even when dead? - -Keratinocytes The two layers of the dermis are the: - -Papillary layer and...

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3 pages

Written in 2023/2024

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Organs that work together to perform a vital function is/are called: - -Organ systems An organ system is best defined as: - -A group of organs that work together to carry out a function. Which organ system does the trachea belong to" - -Respiratory Which organ system does the pituitary gland belong to? - -Endocrine Which of the following structures is shared between the renal and reproductive systems in males? - - Urethra To which organs system to tendons belong? - -Muscular

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4 pages

Written in 2023/2024

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What phrase best describes homeostasis? - -An ability to maintain a relatively stable environment Which feedback mechanism is most commonly used to maintain homeostasis? - -Negative feedback Which of the following would be an example of a positive feedback mechanism? - -Cervical pressure during the childbirth process The main benefit of using negative feedback instead of positive feedback to control a variable is that: - -Negative feedback brings the variable back toward the set point. The...

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2 pages

Written in 2023/2024

Grade A+

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