Final Exam A your and Key ID (A Barco on the answer sheet. Read each question ca

Question

Final Exam A your and Key ID (A Barco on the answer sheet. Read each question carefullyt If you do rstand a question do not hesitate to ask for help. Good Luck! from the Red can sitting on When Joe reaches for the can, upper motor neurons in the Bull the desk are activated. A) postcentral gyrus. B) precentral gyrus lateral gray hom. posterior gray horn. E) none of the above neuron th 2) As Joe reaches for the can, action potentials are propagated down the axon of the lower motor to synaptic knob. When the action potential reaches potassium enters the synaptic knob from the extracelula A) voltage gated potassium channels open and the synaptic fluid. leaves the synaptic knob and enters the extracellul B voltage gated sodium channels open and sodium fluid. voltage gated calcium channels open and calcium enters the synapticknob from the terminal cistern D) voltage gated calcium channels open and calcium enters the synaptic knob from the extracellular flu E) voltage gated calcium channels open and calcium enters the synaptic knob from the mitochondria. 3) The neurotransmitter acetylcholine is released into the neuromuscular junction. Acetylcholine will then A) nicotinic, T-tubule B) nicotinic, motor end plate C) muscarinic, motor end plate D) nicotinic, synaptic knob E) muscarinic, T-tubule enters the sarcoplasm from the 4) Once acetylcholine binds its receptors on skeletal muscle, A) sodium, extracellular fluid B) sodium, terminal cisternae calcium, extracellular fluid D) calcium, T-tubule E) potassium, T-tubule 5) his depolarizes the skeletal muscle cell membrane and an action potential travels cister A) process and down the sarcoplasmic reticulum to the terminal in one direction along the sarcolemma B) in all directions along the sarcolemma and down T-tubules to the terminal cisternae. in one direction along the sarcolemma and down T-tubules to the terminal cisternae. D) in along the sarcolemma and down the sarcoplasmic reticulum to the terminal cister all directions E) in all along the sarcolemma and down T-tubules to the

Explanation / Answer

1)Precentral gyrus-The pyramidal cells of precentral gyrus are known as upper motor neuron and they play role in control of limbs.

2)B

3)B

4)D

5)C

6)C

7)C

8)E

9)D

10)B

11)C

12)B-Isometric: A muscular contraction in which the length of the muscle does not change

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