Answer:
Antibodies are produced by __type B__ lymphocytes; cell-mediated immunity is provided by __type T__ lymphocytes.
Answer: B. blowout fracture.
Explanation:
The blowout fracture or orbital flow fracture is caused by the trauma in the orbital bones. The causes of this fracture are the attack with a blunt object, vehicular accidents, sky fall, blow by a fist and others.
The symptoms of the fracture includes bruising, swelling, redness of eye, double vision (observing two images at the same time), nose bleeds, numbness of cheek, air under the skin below the eye and others.
On the basis of above description, blowout fracture is the suspected fracture in 52 year old women.
Answer:
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Answer:
True
Explanation:
Pacemaker cells, unlike other neurons in the body, can depolarized themselves (and therefore can fire action potentials) without the need of an external innervation of the autonomic nervous system.
Each class of pacemaker cells has its own intrinsic rate.
For example, sinoatrial node rate is 60-100 bpm (the normal heart frequency).
The atrioventricular node is also part of the electrical conduction system of the heart. When the sinoatrial node fails, atrioventricular node takes the lead (40-60 bpm).
