Tutor profile: Caitlin E.
How are one's fingerprints formed?
Fingerprints are patterns of ridges that form on a human's fingers, palms, toes, and feet. Fingerprints are personal- there are no two fingerprints exactly alike (even among identical twins!) Fingerprints are formed while one is still in utero; there are several factors which affect this development. These factors which affect the speed and quality of development while in the womb include genetic makeup, position in the womb, amniotic fluid flow, and umbilical cord length. Other factors may include the mother's general health and whether or not she consumes alcohol or toxic substances. Fingerprints are formed in the innermost layer of the epidermis known as the basal cell layer. The basal cell layer is known for its signature rapid cell growth, which contributes to the folds and various patterns one commonly associates with the fingerprint pattern.
What is known as the "Natural Pacemaker of the Heart"? Describe the pathway of the electrical system of the heart.
The Sinoatrial Node (SA Node). This is referred to as the natural pacemaker of the heart due to regular electrical pulses it originates. These pulses are then sent to the Atrioventricular node (AV node) which is a collection of cells which then send the cardiac pulse to the lower chambers of the heart- the ventricles. From the AV node, the electrical impulse travels through the His-Purkinje network, a pathway of specialized electricity-conducting fibers. After making its way through the His-Purkinje network, the impulse progresses into the muscular walls of the ventricles, causing them to squeeze or "contract". This sequence occurs with every heartbeat (normally 60-100 times per minute).
What would be an example of an open ended question and a closed ended question the nurse could ask a patient?
Open Ended: What are the factors that lead you to feel depressed? Closed Ended: Is that why you are so depressed?