Which of the following activities is a function of the plasma membrane?
A. Digestion of unneeded cell organelles
B. Cell metabolism
C. Detoxification
D. Recognition of bacterial cells by the immune system
E. Transport of products from the nucleus to the endoplasmic reticulum
Answer: D
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When elevating the mandible to chew food, the temporomandibular joint functions as a _________ joint
A. pivot B. ball and socket C. hinge D. saddle
Answer the following statements true (T) or false (F)
1. The lumbosacral enlargement is responsible for innervating the lower limb. 2. The coccygeal ligament and filum terminale support the spinal cord in spinal canal. 3. The conus medullaris is found at L1 to L2 level of vertebral canal. 4. The cervical plexus is responsible for innervating the upper limb. 5. The cauda equina is made of spinal nerves below L2 of the vertebral canal.
The innermost, soft core of the hair shaft is the ________.
A. cuticle B. cortex C. soft keratin D. medulla E. bulb
Which of the following proteins is the main component of thick filaments?
A) myosin B) sarcoplasm C) actin D) myofibril