Class Attendance and Participation Guidelines

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Questions and Answers

What is the primary characteristic of juxtacrine signaling?

Chemical messengers are free-floating in the extracellular matrix.

Chemical messengers are released into the bloodstream.

Chemical messengers are embedded in the plasma membrane of the signaling cell. (correct)

Chemical messengers are only effective at long distances.

What is the expected time for students to join the class?

On the hour

15 minutes after the hour

10 minutes past the hour (correct)

At the beginning of the lecture

Which of the following is NOT one of the possible states of total-body balance?

Negative balance

Positive balance

Equilibrium balance (correct)

Stable balance

What is the primary method of communication for announcements in this course?

Quercus Signup and view all the answers

What does 'acclimatization' refer to in the context of homeostasis?

An improved functioning of an existing homeostatic system. Signup and view all the answers

When are students allowed to email their instructor?

Monday-Friday between 8:00 AM - 5:00 PM Signup and view all the answers

Which statement correctly defines a negative balance in the context of chemical substances in the body?

Total loss exceeds total gain. Signup and view all the answers

How long will quiz recordings be posted for after each lecture?

One week Signup and view all the answers

What factors influence the pool concentration of a substance in the body?

Total amount of the substance and its exchanges within the body. Signup and view all the answers

What should be included in an email to the instructor?

Your name, student number, course code, and university email address Signup and view all the answers

How often will quizzes occur in relation to lectures?

After every lecture, except on test days Signup and view all the answers

What materials are testable in in-person term tests?

Assigned readings and homework Signup and view all the answers

What should students do if they have content questions?

Post them on the Discussion Board Signup and view all the answers

What is the primary role of negative feedback in homeostatic control systems?

To stabilize the variable by reversing changes Signup and view all the answers

Which statement best describes the nature of homeostatic control systems?

They balance inputs and outputs to manage internal variables. Signup and view all the answers

What happens to the set point of a regulated variable during certain conditions?

It is reset to maintain homeostasis. Signup and view all the answers

In a scenario where ATP accumulates in the cells, what does this accumulation control?

It controls the sequence of chemical reactions inhibiting Enzyme A. Signup and view all the answers

How does the concept of 'set point' relate to the regulation of physiological variables?

It provides a range of normal values for variables. Signup and view all the answers

Which of the following is NOT a characteristic of homeostatic control systems?

They maintain complete constancy across all conditions. Signup and view all the answers

Why is the balance between inputs and outputs crucial in homeostatic regulation?

It helps to return the regulated variable to its set point. Signup and view all the answers

Which process serves as an example of negative feedback at the cellular level?

Inhibiting the rate-limiting enzyme by an active product. Signup and view all the answers

What is the primary cycle of circadian rhythm in humans?

Every 24 hours Signup and view all the answers

How do biological rhythms contribute to homeostasis?

They initiate feedback responses without detectors. Signup and view all the answers

What physiological function is NOT strongly associated with circadian rhythm?

Digestion of food Signup and view all the answers

What is a characteristic of negative feedback homeostatic responses?

They are initiated after being perturbed. Signup and view all the answers

Which symptom did the 64-year-old man NOT exhibit as he experienced heat-related issues?

Increased respiratory rate Signup and view all the answers

What mechanism is enabled by biological rhythms to improve homeostasis?

They anticipate challenges before they occur. Signup and view all the answers

What does the absence of perspiration in the elderly man indicate?

Possible heat exhaustion. Signup and view all the answers

What is a common consequence of failing to regulate biological rhythms?

Higher susceptibility to stress. Signup and view all the answers

What will happen if a student misses a term test and does not inform the instructor within 48 hours?

Their grade will not be adjusted. Signup and view all the answers

How many quizzes can a student miss without penalty according to the missed course component policy?

5 quizzes Signup and view all the answers

What documentation is required if a student misses a term test due to a verifiable reason?

An absence declaration from ACORN. Signup and view all the answers

Which of the following statements about homework submission is accurate?

All homework assignments must be submitted on time. Signup and view all the answers

What type of test is offered if a student misses the makeup test?

An oral test. Signup and view all the answers

What is the university's stance on academic integrity?

Academic dishonesty is not tolerated in any form. Signup and view all the answers

If a student has conflicting courses, what accommodations can they expect?

No accommodations will be provided. Signup and view all the answers

What type of questions will the final examination include?

A mix of multiple choice and short answer questions. Signup and view all the answers

Study Notes

Course Attendance and Participation

Attendance is mandatory for lectures, tests, and in-class quizzes.
Classes begin 10 minutes past the hour; punctuality is essential.
Online participants must mute their microphones unless otherwise instructed.
Quizzes occur at the end of nearly every lecture, with no quizzes scheduled during term tests.

Course Materials

Main textbook: Vander's Human Physiology ISE, 16th Edition by Widmaier, Raff, and Strang.
ISBNs: 1265131813 and 9781265131814.
Additional access to digital materials via campus bookstore links.

Communication Guidelines

Announcements will be communicated through emails, primarily via Quercus platform.
Weekly online office hours are held on Mondays from 3:00 PM to 4:00 PM via Zoom.
Email etiquette: Messages should include name, student number, and course code, sent from @mail.utoronto.ca.

Evaluation Structure

In-person term tests last 90 minutes covering lectures, readings, and homework.
Each test includes a mix of multiple-choice and short answer questions.
Weekly homework assignments are due at the end of each week.
Final examination is comprehensive, covering all course material.

Missed Course Components Policy

Notify the instructor within 48 hours of missing a term test for valid reasons to reallocate grades.
Missing both term tests requires a cumulative makeup test at the end of the course.
Up to five missed online quizzes will be dropped without penalty; all homework must be submitted.

Academic Integrity

Adhere to the Code of Student Conduct and the Code of Behaviour on Academic Matters.
Dishonesty, cheating, and disruptive behavior are strictly prohibited.

Homeostatic Control Systems

Negative feedback mechanisms regulate internal variables, aiming to restore balance.
Stability is reached by balancing inputs and outputs, without achieving complete constancy.
Juxtacrine signaling involves communication via membrane-bound messengers between cells.

Total-body Balance

Total-body balance depends on net gain and net loss of substances in the body.
Three states of balance: negative balance (loss > gain), positive balance (gain > loss), and stable balance (gain = loss).

Biological Adaptation

Adaptation refers to characteristics that enhance survival in specific environments.
Acclimatization improves the function of existing homeostatic systems due to environmental changes.

Biological Rhythms

Circadian rhythms cycle approximately every 24 hours, influencing body functions such as temperature and hormone levels.
Rhythms provide anticipatory responses for homeostatic control, activating mechanisms before challenges occur.

Case Study Example

A 64-year-old man suffers from confusion and lack of perspiration after prolonged sun exposure, indicating a potential heat-related illness.
Symptoms include pale-blue skin and fainting; urgent medical attention is critical.

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Description

This quiz outlines the expectations for student attendance and participation in class activities, including lectures and in-class quizzes. Students are encouraged to mark their calendars and adhere to the guidelines for a successful learning experience.