Answer: The correct answer is (D) Both A and B
Explanation:
When an axon is depolarized at halfway to the threshold level,the action potential will be generated that would travel 'downstream' i.e towards the synapse and 'upstream' i.e back towards the cell body. This is because both channels on either sides are not under refractory period,i.e they are open.
Answer:
Atrial dysrhythmias
Explanation:
Postoperative dysrhythmias, mainly atrial dysrhythmias, are common in the first three days following Coronary Artery Bypass Graft (CABG) surgery.
Answer:
Explanation:
Experts recommended acute injury patients use P.R.I.C.E. shortly after the injury occurs. It may be particularly helpful during the first 24 to 72 hours.
P: Protection is meant to prevent further injury. For example, an injured leg or foot may be protected by limiting or avoiding weight-bearing through the use of crutches, a cane, or hiking poles. Partially immobilizing the injured area by using a sling, splint, or brace may also be a means of protection.
R: Rest is important to allow for healing. However, many sports medicine specialists use the term “relative rest” meaning rest that allows for healing, but is not so restrictive that recovery is compromised or slowed. A person should avoid activities that stress the injured area to the point of pain or that may slow or prevent healing. Some movement, however, is beneficial. Gentle, pain-free, range-of-motion and basic isometric contractions of the joints and muscles surrounding an injury have been shown to speed recovery.
I: Ice refers to the use of cold treatments, also known as cryotherapy, to treat acute injuries. Ice is recommended with the intent to minimize and reduce swelling as well as to decrease pain. There are many ways to employ cryotherapy at home. The most common and most convenient is a simple plastic bag of crushed ice placed over a paper towel on the affected area. It is important to protect the skin and limit the cold exposure to 10 to 15 minutes. Cycles of 10 to 15 minutes on and 1 to 2 hours off are generally agreed upon as effective and safer than longer periods of continuous ice application.
