1. Sensation: the process by which sensory receptors and nervous system receive and represent stimulus energies from our environment 2. Perception: the process of organizing and interpreting sensory information‚ enabling us to recognize meaningful objects and events 3. Bottom-up Processing: analysis that begins with the sense receptors and works up to the brain’s integration of sensory information 4. Top- Down Processing: information processing guided by higher-level mental processes
Premium Neuron Retina Sensory system
Answer the following questions: Question 2: Normal carbohydrate digestion results in glucose being absorbed into the blood and elevating blood glucose levels. Why do body cells need glucose? Describe the homeostatic feedback system that would be activated in response to an elevated blood glucose level. Answer: Glucose is the most important fuel for cells as it is used for the synthesis of adenosine triphosphate (ATP)‚ which is a form of energy all body cells can utilise (Marieb & Hoehn‚ 2015). Moreover
Premium Vitamin D Calcium Osteoporosis
sensation of coolness and temperature of our body surface decreases immediately. In this case‚ the receptors sensitive to cold are activated and produce heat that is transferred to the blood flowing in the vessels underneath the skin. This heat then lessens the cooling effect. The hypothalamus performs very active function in this regard as the sympathetic responses are produced as a result of cold receptors activation. These responses are as follows: Epinephrine Secretion occurs from the adrenal medulla
Premium Temperature Thermodynamics Energy
Amplification – one signal = many caspases activate and work towards cell death. 2 major pathways Extrinsic : procaspace activation triggered by outside factor that interacts with receptors in the cell membrane called cell death receptors. Intrinsic : something inside the cell triggers procaspase activation and this may or may not involve SF. You’d think but SF are outside of
Premium Cancer Gene DNA
"When a person glimpses the face of a famous actor‚ sniffs a favourite food or hears the voice of a friend‚ recognition is instant. Within a fraction of a second after the eyes‚ nose‚ ears‚ tongue or skin is stimulated‚ one knows the object is familiar and whether it is desirable or dangerous. How does such recognition‚ which psychologists call preattentive perception‚ happen so accurately and quickly‚ even when the stimuli are complex and the context in which they arise varies? Much is known about
Premium Neuron Brain Action potential
___________. (a) acetyl CoA (b) pyruvate (c) 3-phosphoglycerate (d) glyceraldehyde 3-phosphate 13-5 Glycolysis generates more stored energy than it expends. What is the net number of activated carrier molecules produced in this process (number and type of molecules produced minus the number of those molecules used as input)? (a) 6 ATP‚ 2 NADH (b) 4 ATP‚ 4 NADH (c) 2 ATP‚ 2 NADH (d) 4 ATP‚ 2 NADH 13-6 Which of the following steps or processes in aerobic respiration include the production of carbon dioxide
Free Cellular respiration Adenosine triphosphate Citric acid cycle
Chapter 2- Darwin was the first to suggest how evolutionoccurs. Humans belong to the primate family known as hominins. Characteristics that evolved to perform one function but were co-opted to perform another function are called exaptations. Each group of three consecutive nucleotide bases along the strand of messenger RNA is called a codon‚ which instructs the ribosome to add amino acids to the protein being constructed. Subsequent to the nature-nuture issue‚ a second line of thought surrounding
Premium Neuron Nervous system Action potential
Chapter 15 Signal Transduction 1) Endocrine‚ paracrine ‚ autocrine signaling‚ and cell-cell contact (Fig. 15-2). Endocrine signaling is long distance signaling. An example would be pancreatic cells secreting insulin. Paracrine signaling is for close proximity. An example would be a nerve cell releasing neurotransmitters. In autocrine signaling the cell that produces the ligand also contains the receptor for that ligand. This is how cancer cells work. In signaling by plasma membrane attached
Premium Protein Cell membrane Signal transduction
Endocrine System Chapter 13 Study Guide Name ( ) Revision 2 OVERVIEW The endocrine system‚ like the nervous system‚ controls body activities to maintain a relatively constant internal environment. The methods used by these two systems are different. This chapter describes the difference between endocrine and exocrine glands‚ the location of the endocrine glands‚ and the hormones they secrete (objectives 1 and 6). It explains the nature of hormones‚ the substances that function as hormones
Premium Hormone Endocrine system
that loudness (decibel) is your absolute threshold for sound. * Signal detection theory predicts when we will detect weak signals (measured as our ratio of “hits to “false alarm”). * It seeks to understand why people respond differently to the same stimuli‚ and why the same person’s reactions vary as circumstances change. * In the studies of Warm & Dember‚ 1986‚ that people’s ability to catch a faint signal diminishes after about 30mins. But this diminishing response depends
Free Sense Perception