What event triggers the release of neurotransmitters?
a. Calcium induces the fusion of synaptic vesicles with the presynaptic membrane.
b. Sodium induces the fusion of synaptic vesicles with the presynaptic membrane.
c. Potassium induces the fusion of synaptic vesicles with the presynaptic membrane.
d. Calcium activates enzymes that degrade synaptic vesicles.
e. Sodium activates enzymes that degrade synaptic vesicles.
a
You might also like to view...
Viruses are the most common cause of acute infections that do not result in hospitalization.
Answer the following statement true (T) or false (F)
All steroids have
a. the same number of double bonds. b. one or more fatty acids. c. four rings of carbon to which other atoms are attached. d. the same functional groups. e. the same number and positions of double bonds.
A radical mastectomy involves the removal of
a. any breast tumor. b. a benign breast tumor. c. a malignant breast tumor. d. a breast, all lymph nodes under the arm, and skeletal muscles in the chest wall under the breast. e. both breasts
Which of the following types of ion movement might be expected to require co-transport of protons from the mitochondrial intermembrane space to the matrix, inasmuch as it could not be driven by the membrane potential across the inner membrane? (
Assume that each ion being moved is moving against its concentration gradient.) (a) import of Ca2+ into the matrix from the intermembrane space (b) import of acetate ions into the matrix from the intermembrane space (c) exchange of Fe2+ in the matrix for Fe3+ in the intermembrane space (d) exchange of ATP from the matrix for ADP in the intermembrane space