What major organs are housed in the thoracic cavity?
What will be an ideal response?
Lungs, heart, esophagus, and trachea
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________ is composed of multiple globular molecules polymerized to form long chains or filaments.
A) Troponin B) Actin C) Myosin D) Tropomyosin E) Titin
Answer the following statements true (T) or false (F)
1. The lungs are covered by the parietal pleura. 2. The interior walls of the thoracic cavity are covered by the visceral pleura. 3. The exchange of gases between the air in the alveoli and the blood is called external respiration. 4. A lung problem would most directly affect external respiration. A heart attack that drastically reduced stroke volume would most directly affect internal respiration. 5. Cellular respiration refers to the exchange of gases between the cells and the blood.
The structures that produce sound when air flows through them are the vocal ________.
Fill in the blank(s) with the appropriate word(s).
Which hormones help maintain a relatively constant calcium concentration in the blood?
a. Melanocyte-stimulating hormone (MSH), Calcitonin, Calcitriol b. Luteinising hormone (LH), Calcitonin, Calcitriol c. Adrenocorticotrophic hormone (ACTH), Calcitonin, Calcitriol d. Parathyroid hormone (PTH), Calcitonin, Calcitriol e. none of the above