The action potential on the muscle cell leads to contraction due to the release of calcium ions. Where are calcium ions stored in the muscle cell?
A) cytosol
B) sarcolemma
C) T tubule
D) terminal cisternae of the sarcoplasmic reticulum
Ans: D) terminal cisternae of the sarcoplasmic reticulum
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What do the Nissl bodies in a neuron consist of?
A. Synaptic vesicles B. Neurotransmitters C. Lipofuscin D. Rough endoplasmic reticulum E. Smooth endoplasmic reticulum
The strength of a stimulus is coded by the ____
a. strength of action potentials b. frequency of action potentials c. duration of the resting period d. duration of the refractory periods e. frequency of salutatory periods
What is NOT an effect of parathyroid hormone (PTH)?
A) increased osteoblast activity B) increased reabsorption of calcium ions from fluid in the kidneys C) increased release of calcium ions from bone D) increased absorption of calcium ions by the small intestine