A group of nursing students are studying the conduction system of the heart. The nursing students should recognize that the pacemaker of the heart is known as

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A. Xerostomia: Xerostomia refers to dry mouth, which is caused by reduced saliva production. While it can be a symptom of various conditions, it is not directly associated with facial drooping after a stroke.

B. Epistaxis: Epistaxis is a medical term for a nosebleed. It occurs due to the rupture of small, delicate blood vessels within the nose. While it can happen independently of a stroke, it is not directly related to facial drooping caused by a stroke.

C. Dysphagia: Dysphagia refers to difficulty in swallowing, which can occur after a stroke due to muscle weakness, including the facial muscles. Facial drooping on one side can be indicative of stroke-related muscle weakness and can contribute to difficulties in swallowing.

D. Rhinorrhea: Rhinorrhea is the medical term for a runny nose, where the nasal cavity is filled with a significant amount of mucus. It is usually caused by various factors such as allergies, infections, or irritants. Rhinorrhea is not directly associated with facial drooping after a stroke.

A. Glandular tissue, which supports the breast by attaching to the chest wall: Glandular tissue is indeed a part of the breast structure, but it is not responsible for supporting the breast by attaching to the chest wall. It's the Cooper's ligaments, which are fibrous connective tissue, that provide structural support.

B. Fibrous, glandular, and adipose tissues: This statement is correct. The breast is composed of glandular tissue (responsible for milk production), fibrous tissue (including Cooper's ligaments for support), and adipose tissue (fat).

C. Primarily muscle with very little fibrous tissue: The breast contains very little muscle tissue. The main supportive structure is fibrous tissue, not muscle.

D. Primarily milk ducts, known as lactiferous ducts: Milk ducts are part of the glandular tissue and are responsible for carrying milk. However, the breast is not primarily made up of milk ducts; it consists of a combination of glandular, fibrous, and adipose tissues.