It bends or refracts light rays entering the eyes. C. It is the site of attachment for the extraocular muscles. D. It helps to maintain the shape of the eye. Answer Key: B Question 2 of 20 1.0 Points The border between the transparent edge of the cornea and the white of the fibrous sclera is the: A. pupil. B. anterior chamber.
The cilia are in charge of pushing the with trapped foreign matter to the throat where it can be swallowed/ digested or expectorated. 5. How are the epiglottis and the larynx related in structure and in function? The larynx is also known as the voice box because it contains your body’s vocal chords. The epiglottis is a small flap of tissue that closes over the larynx when one is swallowing (deglutition).
Week 5 Forum Student’s Name Institutional Affiliation Date The amygdala and hippocampus are the main parts of the brain whose responsibility is the regulation of memory. The amygdala is divided into two, the right and left hemispheres. The right hemisphere is responsible for negative emotions like fear and sadness while the left hemisphere induces both the pleasant and unpleasant emotions when stimulated. These hemispheres have independent memory systems but they work together to encode, store and interpret information. The hippocampus on the other side is responsible for the production of corticosteroids (chemicals that produce physiological responses to stimuli).
Four Ventricles of the brain are connected cavities within the brain, where cerebrospinal fluid is produced. Hypothalamus is a region of the brain in partnership with the pituitary gland that controls the hormonal processes of the body as well as temperature, mood, hunger, and thirst. Optic Chiasm is located beneath the hypothalamus and is where the optic nerve crosses over to the opposite side of the brain. Pineal Gland controls the response to light and dark. The exact role of the pineal gland is not certain.
Ciliated Columnar Epithelium are simple columnar epithelial cells but they have fine, hair like cilia on their free surfaces. These cilia are capable of rhythmic, rapid wavelike beatings in a certain direction. This movement causes mucus, secreted by the goblet cells, to move in the same direction. They are usually found in air passages like the nose. It's also found in the uterus and fallopian tubes.
B. What is the cough reflex? Describe the process that Cari’s respiratory system is using to clear her lungs by coughing. The cough reflex is a long and deep inhalation followed by the closing of the glottis, this causes a strong exhalation that pushes the glottis open and sends air through the respiratory passages. Stimulus for the reflex could be a foreign body in the larynx, trachea, or epiglottis.
When I first saw the brain the first thing I noticed was the deep longitudinal fissure that divided the cerebrum in two halves: the left hemisphere and the right hemispheres. Also the surface of the brain was covered with large folds of tissue called gyri. The grooves between the gyri are sulci. The small rounded structure at the back of the brain, I noticed, was the cerebellum. Later, when I turned the brain over, the most prominent structure visible was the optical chiasma, where two optic nerves cross over each other.
Unit 7 Assignment 2: The Effects of Selected Drugs and Diseases on the Central Nervous System 1. The CNS otherwise known as the Central Nervous System is comprised of the brain which is continuous with the spinal cord. Since the CNS is made up of the brain and spinal cord it is protected by the hard bony skull and vertebral column. (Pages 418- 420) 2. The BBB also known as the Blood Brain Barrier which in conjunction with the Cerebrospinal Fluid or CSF is what nourishes and protects the cells of the CNS.
As you focus on a nearby object while it moves closer to your face, all of the following processes occur except: (a) the pupil constricts; (b) the medial rectus muscles contract; (c) the lenses become thicker; (d) the ciliary muscle relaxes; (e) the eye shifts from the scotopic to photopic mode. 15. Otoliths add weight, and thus inertia, to the membranes of: (a) the cochlea; (b) the saccule; (c) the semicircular ducts; (d) the ora serrata; (e) the olfactory
Correct The structure that separates the left and right cerebral hemispheres is the: Your Answer: Longitudinal fissure. 2. Correct The lobe of the brain involved with the coordination of autonomic functions is the: Your Answer: Insula. 3. Correct The structure of the brain that regulates the endocrine system is the: Your Answer: Hypothalamus.