Textbook Question
Describe the response of rhodopsin to light stimuli. What is the outcome of this cascade of events?
2
views
Ch. 15 The Special Senses
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
Chapter 15, Problem 22
Why do you often have to blow your nose after crying
Verified step by step guidance1
Understand that crying produces tears, which are primarily produced by the lacrimal glands located above each eye.
Recognize that tears serve to lubricate and protect the eyes, and excess tears drain through small openings called lacrimal puncta into the lacrimal sac and then into the nasal cavity via the nasolacrimal duct.
Know that when you cry a lot, the increased volume of tears overwhelms the drainage system, causing tears to spill over the eyelids and also increase fluid in the nasal cavity.
Realize that the excess fluid in the nasal cavity stimulates the mucous membranes, leading to a runny nose and the sensation of nasal congestion.
Therefore, blowing your nose after crying helps clear the excess fluid and mucus from the nasal passages, relieving the congestion caused by the overflow of tears.
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Tear Production and Drainage
Tears are produced by the lacrimal glands to lubricate and protect the eyes. When crying, tear production increases significantly, and excess tears drain through small openings called puncta into the nasal cavity via the nasolacrimal duct.
Recommended video:
07:25
Total Products for Each Stage of Aerobic Cellular Respiration
Connection Between Eyes and Nasal Cavity
The nasolacrimal duct links the eyes to the nose, allowing tears to flow from the eyes into the nasal passages. This anatomical connection explains why excess tears can cause a runny nose during crying.
Recommended video:
Guided course
5:45Forces That Shape the Lungs
Nasal Congestion and Mucus Production
When tears enter the nasal cavity, they mix with mucus, increasing fluid volume and causing nasal congestion. This buildup often leads to the need to blow the nose to clear the excess fluid and mucus.
Recommended video:
07:25Total Products for Each Stage of Aerobic Cellular Respiration
Related Practice
Textbook Question
Which of the following is not a possible cause of conduction deafness?
a. Impacted cerumen
b. Middle ear infection
c. Cochlear nerve degeneration
d. Otosclerosis
1
views
Textbook Question
Where are the olfactory sensory neurons, and why is that site poorly suited for their job?
Textbook Question
Pitch is to frequency of sound as loudness is to
a. Quality
b. Intensity
c. Overtones
d. All of these
Textbook Question
Which of the following is important in maintaining the balance of the body?
a. Visual cues
b. Semicircular canals
c. The saccule
d. Proprioceptors
e. All of these