BIO252 - Comprehensive Exam Review Questions and Complete Solutions Graded A+.

BIO252 - Comprehensive Exam Review Questions and Complete Solutions Graded A+ which of the following events will occur when A depolarizing graded potentials reach the membrane of the axon hillock , causing its membrane potential to reach threshold ? - Answer: Voltage - gated Na channels open rapidly Which type of synapse involves the secretion of a neurotransmitter across the synapse to stimulate the post - synaptic cell ? - Answer: Chemical First class lever - Answer: Question is about lifting weights with friends The Sarcoplasmic reticulum stores ? - Answer: calcium Blinking the eyelid - Answer: Tissue not apart of the skeletal muscle Spatial Summation - Answer: Question about summation EPSP - Answer: sodium channels are opened and sodium enters the cell In skeletal muscles , the transverse tubule is an extension of the ? - Answer: Sarcolemma An inhibitory neurotransmitter ___ the postsynaptic membrane. - Answer: Hyperpolarizes ___ cells function as Immune / phagocytic cells within the central nervous system - Answer: Microglial The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by ? - Answer: Oligodendroglia A muscle that provides the major force for producing a specific movement is called ? - Answer: Agonist which of the following glial cells are not found in the CNS ? - Answer: Schwann cells Which of the following would increase the conduction velocity of an action potential ? - Answer: Myelin Sheath Covering the axon Which of the following is described as the most Important function of the RAS ? - Answer: Linking psychological states to physiological states A molecule that freely disassociates with water resulting in a low ph Solution , best describes a ( n ) ___ molecule - Answer: Acid Most homeostatic mechanisms involve ___, a way of counter acting a change ? - Answer: Negative feedback Which of the following cellular organelle can best be described as fairly long , slender extensions of the plasma membrane that help to move fluids or secretions across the cell surface ? - Answer: Cillia Powerhouse - Answer: Mitochondria Mitosis in the correct order - Answer: prophase, metaphase, anaphase, telophase Square layer of skin - Answer: Simple cuboidal Epidermis in the correct order starting with deepest C , D , A , E , B - Answer: Stratum basle (deepest) Stratum Corenum (superficial) Part of the body that is closer to the center of the body than another part ? - Answer: Proximal Chemical reaction that uses water and involves breaking molecules down into smaller pieces ? - Answer: Hydrolysis What kind of tissue is blood ? - Answer: Connective Muscle length changes and moves the load , the tension remains relatively constant through the rest of the contractile period ? - Answer: Isotonic contractions Attachment to the stationary bone ? - Answer: Orgin Striations can be seen on what types of muscle ? - Answer: Cardiac and skeletal What is the membrane of skeletal muscles ? - Answer: SarColemma Molecule that blocks myosin and actin ? - Answer: Tropomyosin What is released at the neuromuscular junction that results in muscular contraction ? - Answer: Acetylcholine IPSP - Answer: Hyperpolarization Muscles that move the eye - Answer: Superior- attaches top of eye , moves eye up Inferior - attaches bottom of eye , moves eye down Medial - attaches near nose - moves eye inward lateral- attaches to side moves eye outward Flexion of the arm - Answer: biceps brachii How many chromosomes do humans have ? - Answer: 46/23 pairs Moves limbs back to anatomical position - Answer: Adduction What type of joint is the hip Joint ? - Answer: Diarthrosis How would excitatory neurotransmitter effect a past synaptic membrane ? - Answer: Depolarizing or hyperpolarizing What types of neuroglial cells found in the CNS ? - Answer: Astrocytes Simple glands are made up of what epithelia cells ? - Answer: Glandular epithelium What type of glands have the primary function of cooling off your body ? - Answer: Eccrine sweat glands what is the external surface of the long bone known as ? - Answer: Periosteum What are mature bone cells called ? - Answer: osteocytes In skeletal muscle tissue where is the calcium stored ? - Answer: Sarcoplasmic reticulum examples of neurotransmitters: - Answer: GABA, Dopamine, Adrenaline, Serotonin, Oxytocin, Acetylcholine Main muscle of inhalation - Answer: Diaphram What happens for an action potential - Answer: In flow of sodium , out flow of , potassium Region of body wrist is in ? - Answer: Carpal 30 layers of dead skin question - Answer: Stratum corneum Divides body in half unevenly - Answer: Parasaggital Sutures - Answer: Synarthrosis Transcription - Answer: Nucleus Muscle fiber - Answer: sarcomere Increase conduction - Answer: Myelin Sheath Covering axon Femur - Answer: Trochanters Myelin sheath in the peripheral system - Answer: Schwann cells Neurotransmitter question - Answer: Calcitonin Epithelial in the integumentary system - Answer: Stratified squamous epithelium