The filamentous protein network that serves as the attachment site for actin myofilaments is called the _____.
a. myosin myofilament
b. actin myofilament
c. sarcomere
d. Z disk
e. cross-bridge
Answer: d. Z disk
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Answer the following statements true (T) or false (F)
1. When B cells come in contact with a specific antigen, they develop into plasma cells. 2. Plasma cells are responsible for long-term immunity. 3. T cells are responsible for long-term immunity. 4. T cells are responsible for humoral immunity. 5. T cells can kill invading cells directly by poisoning them and by releasing a substance that attracts macrophages
Increasing the number of active motor units within a skeletal muscle is called
a) wave summation. b) fused tetanus. c) motor unit recruitment. d) muscle tone. e) flaccidity.
Which of the following drinks reduces the amount of iron absorbed from food?
A) Wine B) Tea C) Coffee D) Milk
Efferent neurons of the
A. somatic motor nerves innervate smooth muscle. B. ANS utilize two neurons in series to connect the CNS to the effector. C. ANS innervate skeletal muscle. D. somatic motor nerves connect skeletal muscles to the chain ganglia of the spinal cord. E. ANS utilize one neuron to connect the CNS to the effector organ.