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UNLV KIN 223 EXAM 4 QUESTIONS AND ANSWERS GRADED A+ 2025/2026

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A neuron conducting a impulse from the stomach wall to the CNS would be classified as a(n) ________ neuron - Answer visceral sensory A nerve - Answer is a cablelike bundle of parallel axons. Which statement is consistent with the current understanding of neural tissue? - Answer Most neurons formed in fetal development last a lifetime, but some brain region in adults can generate new neurons. Which part of the neuron contains the nucleus? - Answer soma The nervous system c...

The secondary ossification center in a long bone is located in the A) diaphysis. B) metaphysis. C) periosteum. D) epiphysis. - Answer D Endochondral ossification begins with a(n) _________ model. A) osteoid B) hyaline cartilage C) membranous D) mesenchyme E) dense connective tissue - Answer B The bones of the fingers and toes (phalanges) are categorized as _____ bones. A) sesamoid B) short C) irregular D) long E) flat - Answer D Parathyroid hormone and calci...

Another name for the intracellular fluid is A) interstitial fluid. B) cytosol. C) cytoplasm. D) cisternae. E) intercellular matrix. - Answer B The phase of mitosis that begins with the arrival of a group of single-stranded chromosomes at each pole of the cell is A) anaphase. B) metaphase. C) telophase. D) prophase. E) S phase. - Answer C The movement of glucose across a plasma membrane is achieved by A) osmosis. B) facilitated diffusion. C) receptor-mediated exocyt...

The term "activation energy" refers to the amount of energy - Answer Required to initiate any chemical reaction Hemoglobin in blood, collagen in tendons, and enzymes in the digestive system are all examples of - Answer Proteins According to the second law of thermodynamics, when energy is transformed from one kind to another - Answer Some of it is converted to heat Generally, a chemical buffer is described as - Answer A weak acid and a weak base that help prevent big c...

The characteristic of muscle that allows it to be passively stretched is - Answer extensibility. Which are possible functions of skeletal muscles? - Answer Maintenance of posture.b: Both highly coordinated and localized simple movements.c: Temperature regulation.d: Support of certain body organs.e: Regulation of the movement of material through certain body tracts. One feature that helps provide fast energy to a muscle cell is the presence of granules containing the complex carbohydr...

Depolarization of a cell membrane occurs because - Answer More sodium ions diffuse into the cell than potassium ions diffuse out of it At resting membrane potential, voltage-gated potassium ion channels are open. - Answer false Depolarization is initiated by a stimulus that makes the membrane potential - Answer more positive Reestablishment of the resting membrane potential occurs through - Answer active transport of sodium and potassium ions A recently depolarized area o...

The characteristic of muscle that allows it to be passively stretched is - Answer extensibility A circular muscle band that contracts at an orifice is also known as a _______________. - Answer sphincter Select all that are true when a muscle fiber is at rest. - Answer - ACh receptors are open - Calcium is stored in the sarcoplasm The ______ is the connective tissue covering of a fascicle. - Answer perimysium Which is the neurotransmitter that causes the release of calciu...

Epicranius - Answer Also known as occipitofrontalis; the broad muscle that covers the top of the skull and consists of the occipitalis and frontalis. Frontal Belly - Answer 1. Moves scalp 2. Raises eyebrows 3. Wrinkles forehead Occipital Belly - Answer Retracts scalp Nasalis - Answer Elevates corners of nose Procerus - Answer Moves and wrinkles nose Buccinator - Answer Compresses cheek Zygomaticus Minor - Answer Elevates corner of mouth Depressor Angu...