Which of the following may occur with aging?
A) more efficient tissue maintenance
B) increased ability to repair connective tissues
C) more fragile connective tissue
D) increased bone strength
E) thicker epithelia
C) more fragile connective tissue
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What type of connective tissue is found in tendons and ligaments?
What will be an ideal response?
Sequence the following events involved in muscle cell contraction
1 . Sodium channels open, allowing sodium to flow in 2 . Impulse reaches axon's synaptic knob 3 . ACh binds to receptors on sarcolemma 4 . Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis 5 . If enough sodium moves in to the muscle cell, an impulse (action potential) develops a. 1, 2, 3, 4, 5 b. 2, 1, 3, 4, 5 c. 2, 4, 3, 1, 5 d. 3, 4, 5, 1, 2 e. 3, 5, 2, 1, 4
What are the two configurations of retinal?
A) linear form and planar form B) linear form and ring form C) R enantiomer and S enantiomer D) bent 11-cis form and the linear 11-trans form E) depolarized form and repolarized form
While a neuron membrane is depolarizing its ________.
A. sodium gates are partially open B. sodium gates are fully open C. chloride gates are partially open D. potassium gates are fully open E. chloride gates are fully open